Solve the Defense Grid DLC puzzle: It's for science, she's a monster

Defense Grid's first story-expansion add-on drops for science on Dec. 7. Titled "You Monster," the DLC features Zoey from Left 4 Dead, who has to navigate various traps and -- just kidding. It features Portal's GLaDOS, and if you really want to play this piece of DLC, you'd better learn to not fall for transparent ruses like that one. GLaDOS will laugh at you. And call you fat. And probably kill you.

"You Monster" will cost $4.99 on Steam or 400 Microsoft Points on Xbox 360, and contains eight new levels and 35 challenge missions, adding more than 15 hours of content where players will fight off Defense Grid aliens and complete GLaDOS' tests. Or, at least you'll try.